Exclusively designed to seamlessly integrate with the Ruger PC Carbine and PC Charger, this magazine well insert assembly is tailored for optimal compatibility. It accommodates an extensive range of Ruger SR-Series & Security-9 9mm & 40 S&W magazines, including (90675, 90691, 90637, 90684, 90638, 90685, 90681, 90667, 90686, & 90449, 90350, 90351 & 90368). Crafted with a flush-fit design the assembly is forged from durable glass-filled polymer material, ensuring robust strength and lasting durability. Installation is a breeze, with comprehensive instructions included with the product. The installation process requires the 5/32 inches hex wrench that comes with the firearm. Proudly manufactured in the USA.